Our closed-form analytical formulas and numerical calculations show that the plasma
production by a two-color (or, more generally, multicolor) femtosecond pulse leads to …

The laser-field-modified dipole response of the first ionization threshold of helium is studied
by means of attosecond transient absorption spectroscopy. We resolve light-induced time …

We study the role of electron-electron correlation in the ground state of Ne, as well as in
photoionization dynamics induced by an attosecond XUV pulse. For a selection of central …

The analysis of quantum beats in time-resolved spectroscopic signals is becoming a task of
primary importance because it is now clear that they bring crucial information about …

We investigate the excitation and probing of electronic coherences in atoms by a sequence
of optical attosecond pulses. Wave packets representing the coherent superposition of …

We propose a technique to fully characterize the temporal structure of extreme ultraviolet
pulses by ionizing a bound coherent electronic wave packet. The influence of the dipole …

We investigate the possibility of using transient absorption of a coherent bound electron
wave packet in hydrogen as an attosecond pulse characterization technique. In a recent …

We propose a scheme that utilizes weak-field-induced quantum beats to investigate the
electronic coherences of atoms driven by a strong attosecond extreme ultraviolet (XUV) …

We have investigated the rich dynamics of complex wave packets composed of multiple high-
lying Rydberg states in He. A quantitative agreement is found between theory and time …

Ionization-induced multiwave mixing is attracting much interest nowadays due to the
possibility of generating short pulses of secondary radiation over a very wide spectral range …